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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

speedometer issue

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Old May 12, 2012 | 09:09 AM
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Default speedometer issue
hey guys i have an a4 96 trans am and sometimes when im driving slow in reverse and sometimes while driving slow in drive the speedometer will shoot up to 150 then back down. any ideas on what this could be?
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Old May 12, 2012 | 10:16 AM
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Ever get the car tuned after the 3.73 gear change?
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Old May 12, 2012 | 11:46 AM
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Yes i did this started a littlw while after
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Old May 13, 2012 | 08:32 AM
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anything? could it be the vss?
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Old May 13, 2012 | 11:54 AM
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VSS is what controls the speedometer. It picks up the tailshaft speed. I've never seen anyone say one has gone bad. Although I don't usually read speedometer problem threads.

Let someone else chime in.
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Old May 15, 2012 | 07:31 AM
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anyone else?
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Old May 15, 2012 | 08:37 AM
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Usually if the VSS goes bad it will read 0, not peg out.
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Old May 15, 2012 | 04:44 PM
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alright so vss is out, any other possible reasons why it shoots up?
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Old May 20, 2012 | 08:47 AM
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anyone?
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Old May 20, 2012 | 09:21 AM
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pull the sensor and make sure there is no build up or metal stuck to it.
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